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| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2017-05-24 19:22:19 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-05-30 12:45:21 +0200 |
| commit | db46a72b9713fd20c405e796d7ef841f6d9bd15f (patch) | |
| tree | c0c124632e51cf3088d5682fdfef06ff81bffdb7 /arch | |
| parent | arm64: futex: Fix undefined behaviour with FUTEX_OP_OPARG_SHIFT usage (diff) | |
| download | linux-db46a72b9713fd20c405e796d7ef841f6d9bd15f.tar.xz linux-db46a72b9713fd20c405e796d7ef841f6d9bd15f.zip | |
ARM64/PCI: Set root bus NUMA node on ACPI systems
PCI core requires the NUMA node for the struct pci_host_bridge.dev to
be set by using the pcibus_to_node(struct pci_bus*) API, that on ARM64
systems relies on the struct pci_host_bridge->bus.dev NUMA node.
The struct pci_host_bridge.dev NUMA node is then propagated through
the PCI device hierarchy as PCI devices (and bridges) are enumerated
under it.
Therefore, in order to set-up the PCI NUMA hierarchy appropriately, the
struct pci_host_bridge->bus.dev NUMA node must be set before core
code calls pcibus_to_node(struct pci_bus*) on it so that PCI core can
retrieve the NUMA node for the struct pci_host_bridge.dev device and can
propagate it through the PCI bus tree.
On ARM64 ACPI based systems the struct pci_host_bridge->bus.dev NUMA
node can be set-up in pcibios_root_bridge_prepare() by parsing the root
bridge ACPI device firmware binding.
Add code to the pcibios_root_bridge_prepare() that, when booting with
ACPI, parse the root bridge ACPI device companion NUMA binding and set
the corresponding struct pci_host_bridge->bus.dev NUMA node
appropriately.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Robert Richter <rrichter@cavium.com>
Tested-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/pci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 4f0e3ebfea4b..108283443336 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -108,7 +108,10 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) if (!acpi_disabled) { struct pci_config_window *cfg = bridge->bus->sysdata; struct acpi_device *adev = to_acpi_device(cfg->parent); + struct device *bus_dev = &bridge->bus->dev; + ACPI_COMPANION_SET(&bridge->dev, adev); + set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev))); } return 0; |